Lifepo4 guidance

[Rlsimon]

Lithium guidance

I have read all my brain can absorb and still have a couple of questions. I have a 48v Club Car DS that I use for hunting with the common upgrades(controller, motor, reverse switch, wires, etc). The Trojans are done so it’s time to make the switch. I have a bunch of LEV60F 74ah cells. If I can get away with a 16S pack I will but I’ll probably end up with 16S2P with two BMS.

Questions

1. Could two JK B2A20S20P (200 amps continuous,350 peak) handle the power without a separate hv/lv cutoff?
2. If no to #1, what is the most simple, dependable solution? Build it with relays and diodes, gigavac contactor, etc. I read that a MJZ400 solenoid could be used but not how.
3. How would I wire the two bms together for the hv/lv cutoffs to work together?

Thanks for any solutions or suggestions in advance.

 

[chrisski]

Could two JK B2A20S20P (200 amps continuous,350 peak) handle the power without a separate hv/lv cutoff?

Not sure what “the power” is. Is 200 amps continuous and 350 amps peak the BMS rating or the vehicle output?

For a 74 amp lithium cell, that’s a lot, probably exceeds specs. Most have a .5c or 1c max discharge, rarely up to 3c.

How would I wire the two bms together for the hv/lv cutoffs to work together

I just program my BMS the same and it cuts off per specs. I have only had low voltage cutoffs on mine.

 

[wpns]

common upgrades(controller, motor, reverse switch, wires, etc)

Only you would know what that requires as to battery current, standard 48V cart load is 50A, though probably higher on acceleration, up hills, towing, heavy loads, etc. My XRT810 runs around 50, though it peaks around 75 for very brief moments.

 

[Rlsimon]

Not sure what “the power” is. Is 200 amps continuous and 350 amps peak the BMS rating or the vehicle output?

For a 74 amp lithium cell, that’s a lot, probably exceeds specs. Most have a .5c or 1c max discharge, rarely up to 3c.


I just program my BMS the same and it cuts off per specs. I have only had low voltage cutoffs on mine.

The cells are rated at 180 amps continuous, 600 amps peak. They were intended for automotive starter batteries

 

[Rlsimon]

Not sure what “the power” is. Is 200 amps continuous and 350 amps peak the BMS rating or the vehicle output?

For a 74 amp lithium cell, that’s a lot, probably exceeds specs. Most have a .5c or 1c max discharge, rarely up to 3c.


I just program my BMS the same and it cuts off per specs. I have only had low voltage cutoffs on mine.

The “power” I was referring to was the ratings of the bms